How were gas vans primarily used by the nazis in carrying out the final solution?
they poisoned victims with gas from the van’s exhaust.
they gathered victims and transported them to concentration camps.
they transported large groups of victims out of the country.
they confined victims in the van for long periods of time as punishment.

Gas vans were used by Nazis, as they poisoned victims with gas from the van's exhaust. Such a deadly vehicle had a air-tight compartment, in which exhaust gas were emitted for killing victims while the engine was operating. Thus, the victims were killed by carbon monoxide from exhaust gases and suffocation. It is believed that the gas van was first used in the Soviet Union in the 1930's.

The answer is: A.

the committing of terrorist acts in the perpetrator's own country against their fellow citizens.

worldwide, 780 million people do not have access to an improved water source. an estimated 2.5 billion people lack access to improved sanitation (more than 35% of the world's population)